Speech therapy, if you can get one. If not, there are several free ebooks on the internet that might help you to understand the mechanism behind stuttering and several techniques to control it, and many good advices. This is [some free E-books](https://www.stutteringhelp.org/free-e-books) I would advice to firstly read [Advice to Those Who Stutter ](https://www.stutteringhelp.org/sites/default/files/Book0009.pdf) And then [Self-Therapy for the Stutterer ](https://www.stutteringhelp.org/sites/default/files/Book0012.pdf) Both books are really good and well written by professionals in the field of stuttering.